1. Question : Hemolytic disease of the newborn (HDN) can occur if
the mother:
Student Is Rh-positive and the fetus is Rh-negative
Answer:
Is Rh-negative and the fetus is Rh-positive
Has type A blood and the fetus has type O
Has type AB blood and the fetus has type B
Instructor HDN can occur only if antigens on fetal erythrocytes differ from
Explanation antigens on maternal erythrocytes. Maternal-fetal incompatibility
: exists only if the mother and fetus differ in ABO blood type or if
the fetus is Rh-positive and the mother is Rh-negative. This
erythrocyte incompatibility does not exist in any of the other
options.
-589875941 MultipleChoice 68 True
0 -589875941 MultipleChoice 68
Question 2 Question : Examination of the throat in a child demonstrating signs
. and symptoms of acute epiglottitis may contribute to
which life-threatening complication?
Student Retropharyngeal abscess
Answer:
Laryngospasms
Rupturing of the tonsils
Gagging induced aspiration
Instructor Examination of the throat may trigger laryngospasm and cause
Explanation respiratory collapse. Death may occur in a few hours. This
: selection is the only option that accurately identifies the life-
, threatening complication that can result from an examination of
the throat of a child who demonstrates the signs and symptoms of
acute epiglottitis.
-589875940 MultipleChoice 87 True
0 -589875940 MultipleChoice 87
Question 3 Question : If the sinoatrial (SA) node fails, then at what rate
. (depolarizations per minute) can the atrioventricular
(AV) node depolarize?
Student 60 to 70
Answer:
40 to 60
30 to 40
10 to 20
Instructor If the SA node is damaged, then the AV node will become the
Explanation heart’s pacemaker at a rate of approximately 40 to 60
: spontaneous depolarizations per minute.
-589875939 MultipleChoice 75 True
0 -589875939 MultipleChoice 75
Question 4 Question : What is the ratio of coronary capillaries to cardiac
. muscle cells?
Student 1:1 (one capillary per one muscle cell)
Answer:
1:2 (one capillary per two muscle cells)
1:4 (one capillary per four muscle cells)
1:10 (one capillary per ten muscle cells)
Instructor The heart has an extensive capillary network, with
Explanation: approximately 3300 capillaries per square millimeter (ca/mm2)
or approximately one capillary per one muscle cell (muscle
fiber).
, -589875938 MultipleChoice 73 True
0 -589875938 MultipleChoice 73
Question 5 Question : Which cytokines initiate the production of corticotropin-
. releasing hormone (CRH)?
Student IL–1 and IL-6
Answer:
IL-2 and TNF-
IFN and IL-12
TNF-ß and IL-4
Instructor Although a number of stress factors initiate the production of
Explanation CRH, of the options available, only high levels of IL-1 and IL-6
: initiate such a response.
-589875937 MultipleChoice 21 True
0 -589875937 MultipleChoice 21
Question 6 Question : What process allows the kidney to respond to an
. increase in workload?
Student Glomerular filtration
Answer:
Secretion of 1,25-dihydroxyvitamin D3
Increased heart rate
Compensatory hypertrophy
Instructor Compensatory hypertrophy allows the kidney to respond to an
Explanation increase in workload throughout life. The remaining options are
: not relevant to accommodating an increased workload.
-589875936 MultipleChoice 108 True
0 -589875936 MultipleChoice 108
Question 7 Question : Which type of antibody is involved in type I
. hypersensitivity reaction?
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